[(IMes)2Pt(H)(ClBC5H4SiMe3)]: a Borabenzene-Platinum Adduct with an Unusual Pt-Cl-B Interaction

André Languérand, Stephanie S. Barnes, Guillaume Bélanger-Chabot, Laurent Maron, Philippe Berrouard, Pierre Audet, Frédéric-Georges Fontaine
2009 Angewandte Chemie  
This is the peer reviewed version of the following article: [[(IMes)2Pt(H)(ClBC5H4SiMe3)]: a Borabenzene-Platinum Adduct with an Unusual Pt-Cl-B Interaction, Angew. Chem. Int. Ed. 2009, 48, 6695 -6698], which has been published in final form at [Since the first report of a metallaboratrane by Hill in 1999, [1] there has been a quest for transition metal complexes containing a dative interaction with group XIII Lewis acids. In a recent report, Braunschweig demonstrated that [(PCy3)2Pt 0 ]
more » ... ts with alanes to form Lewis adducts [(PCy3)2Pt(AlX3)], [2] which are rare examples of well characterized alane (M→AlR3) complexes. [3] [4] However, the analogous reaction with haloboranes does not yield Lewis adducts, but instead forms platinum boryl complexes, [5] a class of anionic boron containing species with numerous examples reported to date. [6] The only compounds having an M→B dative interaction with boron are supported by ambiphilic ligands. [7] [8] [9] While metallaboratranes having bis-or tris(methimazolyl)boranes have the borane coordinating the transition metal selectively, [10] the Lewis acid moiety of phosphinoboranes, prepared by Bourissou, [11] in addition to interacting with a transition metal can interact with an anionic ligand within the coordination sphere, depending on the nature of the transition metal and the ambiphilic ligand. Such an interaction is seldom observed with Lewis acids and is supported by ambiphilic ligands, [12] with the exception of BF4 adducts and halocarboranes where the Lewis acidity of the boron can no be longer considered. [13]
doi:10.1002/ange.200902870 fatcat:nw3wnubq4rbzffb27ugziu3gcm